CROSS-RATIO

作品数：5被引量：2H指数：1
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相关领域：理学更多>>
相关作者：王林李斌更多>>
相关机构：中国科学技术大学更多>>
相关期刊：《Science China Mathematics》《计算机应用与软件》《Acta Mathematica Sinica,English Series》《Chinese Journal of Aeronautics》更多>>
相关基金：国家自然科学基金更多>>
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Estimate pose deviation of on-orbit deployable mechanisms based on cross-ratio invariability
《Chinese Journal of Aeronautics》2024年第10期483-492,共10页Peiran ZHANG Fuqiang ZHOU Zhipeng SONG Wentao GUO Haishu TAN 
Supported in part by the National Natural Science Foundation of China(No.62271148).
With the rapid development of space science projects,large deployable mechanisms have been widely used.However,due to the effects of mechanical friction and gravitational acceleration,on-orbit mechanisms cannot be alw...
关键词：Cross-ratio invariability Deployable mechanism Pose deviation estimation Single-DOF constraint Vision measurement 
头部可自由运动的头戴式视线跟踪系统设计被引量：1
《计算机应用与软件》2015年第7期163-166,共4页王林 李斌 
国家自然科学基金委-广东省联合基金重点项目(U0835002)
为了实现头部自由运动下的屏幕凝视点准确估计,设计一套基于场景摄像机和屏幕四角红外灯的头戴式视线跟踪系统。利用投影空间的不变量cross-ratio将凝视点在参考屏幕上的位置转化为当前屏幕上的实际位置,并在场景摄像机坐标系下对头部...
关键词：头戴式 视线跟踪 场景摄像机 cross-ratio参考屏幕 
The Cross-ratio Compactification of the Configuration Space of Ordered Points on
《Acta Mathematica Sinica,English Series》2012年第10期2129-2138,共10页Risako FUNAHASHI Masahiko TANIGUCHI 
supported by Grants-in-Aid for Scientific Research (C) (Grant No. 23540202);Grant-in-Aids for Scientific Research (B) (Grant No. 20340030)
A natural compactification of the virtual configuration space of N points on the Riemann sphere C is constructed by using cross-ratios. We show that this compactification is homeomorphic to the Bers＇ compactification...
关键词：Cross-ratios configuration space planar domains with nodes 
The cross-ratio distortion of integrably asymptotic affine homeomorphism of unit circle
《Science China Mathematics》2012年第3期625-632,共8页WU Chong 
Let QS* (S 1) be the space of quasisymmetric homeomorphisms of the unit circle such that the corresponding subspace of the universal Teichmu¨ller space has Weil-Petersson metric.In this paper we give a necessary cond...
关键词：universal Teichm/iller space quasisymmetric homeomorphism Weil-Petersson metric CROSS-RATIO 
Research on the measurement of belt speed by video in coal mine based on improved template matching algorithm被引量：1
《Journal of Coal Science & Engineering(China)》2011年第4期469-474,共6页ZHU Ai-chun HUA Wei WANG Chun WANG Yong-xing 
In order to improve the intelligence of video monitoring system of belt and make up the deficiency of higher failure rate and bad real-time performance in the traditional systems of measurement of belt speed, accordin...
关键词：speed measurement by video template matching algorithm DM642 invariance of cross-ratio 
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